Railroad Archives Online
- CollectionD0504b - Al Christianson Collection - Friends of the Burlington Northern Railroad
- Series001 - Burlington Northern Railroad Company
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3002 - Diesel Locomotives
- 200 more...
- ItemChristianson000246 - Burlington Northern Diesel Locomotives Number 6170 and Number 6057 with a Boxcar at Fremont, Nebraska in 1981
- ItemChristianson000247 - Burlington Northern Diesel Locomotive Number 6184 with Covered Hoppers at Kearney, Nebraska in 1981
- ItemChristianson000248 - Burlington Northern Diesel Locomotive Number 6184 with Covered Hoppers near Kearney, Nebraska in 1981
- ItemChristianson000249 - Burlington Northern Diesel Locomotive Number 6184 with a Frisco Covered Hopper near Kearney, Nebraska in 1981
- ItemChristianson000250 - Burlington Northern Diesel Locomotive Number 6234 with Freight Cars at Golden, Colorado in 1981
- ItemChristianson000101 - Burlington Northern Diesel Locomotives 778, 773 and 783 at Fridley, Minnesota in 1981
- ItemChristianson000102 - Burlington Northern Diesel Locomotive 780 at Fergus Falls, Minnesota in 1981
- ItemChristianson000103 - Burlington Northern Diesel Locomotives 780, 783 and 768 at Fergus Falls, Minnesota in 1981
- ItemChristianson000104 - Burlington Northern Diesel Locomotive 782 and 1550 at Minneapolis, Minnesota in 1980
- 46 more...